WO2000073118A1 - Dispositif de surveillance destine a des roues de vehicules ferroviaires - Google Patents

Dispositif de surveillance destine a des roues de vehicules ferroviaires Download PDF

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Publication number
WO2000073118A1
WO2000073118A1 PCT/CH2000/000170 CH0000170W WO0073118A1 WO 2000073118 A1 WO2000073118 A1 WO 2000073118A1 CH 0000170 W CH0000170 W CH 0000170W WO 0073118 A1 WO0073118 A1 WO 0073118A1
Authority
WO
WIPO (PCT)
Prior art keywords
rail
force sensor
base plate
rail base
force
Prior art date
Application number
PCT/CH2000/000170
Other languages
German (de)
English (en)
Inventor
Martin Lustenberger
Original Assignee
Digi Sens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Digi Sens Ag filed Critical Digi Sens Ag
Priority to EP00908906A priority Critical patent/EP1100707A1/fr
Publication of WO2000073118A1 publication Critical patent/WO2000073118A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • B61L1/06—Electric devices associated with track, e.g. rail contacts actuated by deformation of rail; actuated by vibration in rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/12—Measuring or surveying wheel-rims

Definitions

  • the present invention relates to a device for monitoring the condition of the wheels or tires of rail vehicles according to the preamble of claim 1.
  • Such devices are known, for example from DE 33 09 908 AI (Dl) and US 5,743,495 (D2).
  • a measuring device which consists of about 20 measuring points per rail. Each measuring point is generated by a strain gauge measuring bridge attached to the rail - usually on the side of the web.
  • the associated electronics determine the mean value of the Ra ⁇ _ast for each wheel and the peak values resulting from any flat spots. Relative values from peak load to load value are also calculated. With the device presented, the static loads can also be determined.
  • a device is known from D2 in which vibration, movement or acceleration sensors on the rails record their horizontal and / or vertical displacement or acceleration. This is intended to detect flat spots on the wheels and even - accidentally in the measuring section or when there are rail breaks.
  • the object of the present invention is to reliably determine damage to wheels or wheel tires of railway vehicles, to determine the type of damage with great certainty, to assign the possible shows to the relevant axis and the train number and, if appropriate, to trigger a suitable alarm. Moreover, it is to integrate the Aufgaoe the invention, this device cost herzustelle and a vertretoaren effort in the substructure, especially without interfering with the sliding b s.
  • the solution of the stated problem is wie ⁇ erpressed in the characterizing part of claim 1 zeicrnenden "mengine the main features. ⁇ en in further advantageous embodiments Patentansprucnen respect An-.ard of the accompanying Ze_chnu '" g ⁇ d e invention will ei.a ⁇ tert Raner. It eiger
  • 1 is a schematic representation of the device
  • 2 shows the sound of a force sensor when it is driven over by a wheel
  • FIG. 5 shows the schematic section through a first exemplary embodiment of a force sensor
  • FIG. 6 shows the schematic section through a second exemplary embodiment of a force sensor
  • FIG. 7 shows the schematic section through a solution for a force sensor that includes several exemplary embodiments.
  • FIG. 1 shows in schematic form an embodiment of the device according to the invention.
  • a railroad rail 1 lies on rail base plates 3 carried by sleepers 2.
  • a number of rail base plates 3 - in FIG. 1 there are four of them - contain suitable force sensors integrated therein
  • the force sensors 4 nachgeschal ⁇ are et preamplifier
  • the individual preamplifiers 5 are connected to a signal analyzer 6, and this to a recnner 7 and a web control center 8.
  • the computer 7 can of course also contain the signal analyzer 6, however. also be designed as an independent unit.
  • ⁇ b s width of the threshold v, train speed until the wheel leaves the second threshold 2, followed by a linear drop corresponding to the increase.
  • the time from the end of the signal rise to the end of its fall is denoted here by ⁇ t s , where
  • d s distance between the same edges of two sleepers.
  • the signal curves in FIGS. 2 and 3 are idealized; the wheel under consideration also shows no irregularities.
  • 3a is the representation of the signal curves of, for example, four successive sensors 4. If each signal is considered individually and related to that of the immediately adjacent force sensor, the train speed can be determined from ⁇ t s :
  • J-I results in the course shown in FIG. 3b: after the first ascent, the signal remains essentially constant until the wheel leaves the last threshold 2 with force sensor 4, whereupon the signal drop shown occurs.
  • the number n of force sensors 4 to be provided is determined by the threshold distance ⁇ b s and the largest possible wheel diameter D R that is to be detected, so that ⁇ -D p n>
  • the signal forms that occur with a certain damage pattern are typical of the type of damage, furthermore speed-dependent and ultimately specific for the type of force sensor 4 used.
  • the train speed v z is determined from the time interval between the signal increases; this is now used as a normalization factor for the signal heights, since the dynamic loads acting on the force sensors 4 are essentially speed-proportional.
  • Various signal forms corresponding to the individual damage patterns are stored in the computer 7.
  • the basic signals - already speed-standardized by the computer 7 - are subtracted from the total signal.
  • the basic signal thus means the sum signal s tc- generated by driving a damage-free wheel.
  • the remaining, also speed-standardized signals are compared in the signal analyzer 6 with the stored signals. The results of the comparison are transmitted to the web control center 8, via electrical cables, light guides or wirelessly.
  • the railway control center either makes repair decisions or - in serious cases - arrives directly and without human intervention Triggered alarm that stops the Z-iges; the locomotive via route signals or direct transmission.
  • 5 to 7 show different exemplary embodiments of force sensors in an exemplary but not restrictive design.
  • 5 is the cross section through a rail foot 11 and a first exemplary embodiment of the force sensor 4. This is designed as a rail base plate and guides the entire wheel load to the threshold 2 a b. 5 is composed of an upper and a lower elastomer layer 12, a lower and an upper insulation layer 13, a lower and an upper electrode 14 and the piezoelectric layer 15. The two electrodes 14 are connected to conductors 16 which lead to the preamplifier 5, not shown here.
  • Piezoelectric layers 15 come e.g. Polyvinyl fluoride materials in question because of their elastic properties and the low dielectric constants are particularly suitable. The outer ends of the force sensor against weather and environmental influences are not shown.
  • FIG. 5 is intended as a schematic illustration, since further details, such as rail fastening and means for adjusting the track, are omitted as known, which are also used when the rail base plates 3 are replaced by the force sensor 4 according to FIG. 5 do not need to experience any change.
  • 6 shows a further exemplary embodiment with piezoelectric fresh transducers.
  • a large number of ceramic piezoelectric transducers 17 m are inserted into an elastomer plate 18, which in turn is a rail base plate 3 in the functional unit.
  • the individual transducers 17 are connected in series, for example.
  • the corresponding overall signal is with the. Ladders 16 tapped.
  • the elastomer surrounding the transducer 1 ⁇ partially acts as a force bypass or elastic reduction.
  • the exemplary embodiment according to FIG. 7 stands for several transducers which are possible according to the invention: embedded in the rail base plates 3 is a schematic transducer 19 which converts the force or distance into an electrically unambiguously dependent signal.
  • This can be a known and suitably shaped metallic body with a strain gauge bridge, it can also be a vibrating string transducer, a capacitive transducer or a deformable light guide; all without restrictive character. It is essential for all of the transducers described in FIGS. 5 to 7 that they can bear the entire wheel load, as in FIG.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

L'invention concerne un dispositif composé de plusieurs capteurs de force (4) qui sont réalisés sous forme de selles de rail (3) et qui remplacent ces dernières au niveau des deux rails (1) dans la section de mesure. Les signaux électriques des capteurs de force (4) sont cédés à un analyseur de signaux (6) via un préamplificateur (5), l'analyseur de signaux (6) étant relié à un ordinateur (7). Les résultats pertinents de l'ordinateur (7), c'est-à-dire les résultants concernant les zones plates de roues de wagons ou encore les ruptures de roues, sont retransmis par fil, câble conducteur optique ou radio à un centre de commande ferroviaire (8).
PCT/CH2000/000170 1999-05-28 2000-03-23 Dispositif de surveillance destine a des roues de vehicules ferroviaires WO2000073118A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00908906A EP1100707A1 (fr) 1999-05-28 2000-03-23 Dispositif de surveillance destine a des roues de vehicules ferroviaires

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH100199 1999-05-28
CH1001/99 1999-05-28

Publications (1)

Publication Number Publication Date
WO2000073118A1 true WO2000073118A1 (fr) 2000-12-07

Family

ID=4200145

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2000/000170 WO2000073118A1 (fr) 1999-05-28 2000-03-23 Dispositif de surveillance destine a des roues de vehicules ferroviaires

Country Status (2)

Country Link
EP (1) EP1100707A1 (fr)
WO (1) WO2000073118A1 (fr)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207091A1 (fr) * 2000-11-16 2002-05-22 Siemens Aktiengesellschaft Dispositif pour détecter des non-uniformités dans les roues de véhicules ferroviaires
WO2004071840A1 (fr) * 2003-02-13 2004-08-26 Schenck Process Gmbh Parcours de mesure permettant de determiner differentes grandeurs physiques de vehicules ferroviaires
FR2893900A1 (fr) * 2005-11-29 2007-06-01 Signal Dev Sarl Procede et dispositif de detection de defauts de circularite de roues de materiel ferroviaire et systeme comprenant un tel dispositif
EP1839990A2 (fr) * 2006-03-31 2007-10-03 Bernd Neuroth Dispositif pour la vérification des roues d'un véhicule ferroviaire
WO2008021688A2 (fr) * 2006-08-15 2008-02-21 General Electric Company Système et procédé d'acquisition de position de matériel roulant
WO2008094064A1 (fr) * 2007-01-31 2008-08-07 Plotnikov Sergei Vasil Evich Procédé de surveillance des paramètres d'une paire de roues et de sa position par rapport à des rails
WO2009142532A1 (fr) * 2008-05-20 2009-11-26 Luchkin Viktor Alexeevich Semelle de rail
WO2009142531A1 (fr) * 2008-05-20 2009-11-26 Luchkin Viktor Alexeevich Procédé de mesure de poids et de diagnostic de transport ferroviaire sous le patin d’un rail utilisant la semelle de rails
WO2009142533A1 (fr) * 2008-05-20 2009-11-26 Luchkin Viktor Alexeevich Balance pour peser des objets ferroviaires mobiles statiques ou dynamiques utilisant une semelle de rail
KR101048804B1 (ko) 2009-04-30 2011-07-12 한국유지관리 주식회사 레일 누적 통과 톤수 실측 장치
GB2499602A (en) * 2012-02-21 2013-08-28 Abmech Design And Analysis Ltd Load measuring elastomeric rail pad
EP2647543A1 (fr) 2012-04-04 2013-10-09 SST Signal uns System Technik GmbH Système de détection de caractéristiques de véhicules ferroviaires passant
CN106274982A (zh) * 2016-07-28 2017-01-04 宁波市江北九方和荣电气有限公司 车辆轮对在线动态检测系统电缆环形传感器驱动电路
CN106394606A (zh) * 2016-11-10 2017-02-15 北京康拓红外技术股份有限公司 一种铁路车辆车轮失圆检测方法及检测装置
US10435052B2 (en) 2017-02-22 2019-10-08 Tetra Tech, Inc. Broken wheel detection system
WO2020015960A1 (fr) * 2018-07-20 2020-01-23 Schenck Process Europe Gmbh Procédé et système de reconnaissance d'une roue de véhicule ferroviaire
DE102018119247A1 (de) * 2018-08-08 2020-02-13 Schenck Process Europe Gmbh Messsystem und Messsystemgruppe
US10582187B2 (en) 2015-02-20 2020-03-03 Tetra Tech, Inc. 3D track assessment method
US10625760B2 (en) 2018-06-01 2020-04-21 Tetra Tech, Inc. Apparatus and method for calculating wooden crosstie plate cut measurements and rail seat abrasion measurements based on rail head height
US10728988B2 (en) 2015-01-19 2020-07-28 Tetra Tech, Inc. Light emission power control apparatus and method
US10730538B2 (en) 2018-06-01 2020-08-04 Tetra Tech, Inc. Apparatus and method for calculating plate cut and rail seat abrasion based on measurements only of rail head elevation and crosstie surface elevation
WO2020191418A1 (fr) * 2019-03-22 2020-10-01 Getzner Werkstoffe Holding Gmbh Voie ferrée
US10807623B2 (en) 2018-06-01 2020-10-20 Tetra Tech, Inc. Apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US10908291B2 (en) 2019-05-16 2021-02-02 Tetra Tech, Inc. System and method for generating and interpreting point clouds of a rail corridor along a survey path
DE102020127311A1 (de) 2020-10-16 2022-04-21 BEN-INNOVA Systemtechnik GmbH Vorrichtung zur Festbrems- und/oder Heißläuferortung bei Schienenfahrzeugen und System mit einer Vorrichtung zur Festbrems- und/oder Heißläuferortung und zumindest einer Schwelle zur Auflage von Schienen
US11377130B2 (en) 2018-06-01 2022-07-05 Tetra Tech, Inc. Autonomous track assessment system
RU2778101C1 (ru) * 2019-03-22 2022-08-15 Гетцнер Веркштоффе Холдинг Гмбх Железнодорожный путь

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2628817B1 (fr) 2012-02-15 2016-11-02 IHI Hauzer Techno Coating B.V. Article revêtu d'acier martensitique et procédé de formation d'un article revêtu d'acier

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JPS58155303A (ja) * 1982-03-12 1983-09-16 Japanese National Railways<Jnr> 鉄道車両用車輪のタイヤフラット検出装置
DE3309908A1 (de) * 1982-04-22 1983-11-03 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Verfahren zur erkennung von flachstellen an schienenraedern
WO1986001167A1 (fr) * 1984-08-14 1986-02-27 Haollberg Karl Rune Soeren Procede et dispositif de detection de roues avec des bandes de roulement deformees dans des vehicules de chemin de fer
WO1993025872A1 (fr) * 1992-06-12 1993-12-23 Frontec Pajala Ab Dispositif de pesage pour vehicules montes sur rails
DE4432329A1 (de) * 1994-09-10 1996-03-14 Daimler Benz Ag Verfahren zur Zuglauf- und Fahrwegüberwachung
ZA962439B (en) * 1995-05-09 1996-10-01 Plasser Railway Machinery Sout Flat wheel detector

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JPS58155303A (ja) * 1982-03-12 1983-09-16 Japanese National Railways<Jnr> 鉄道車両用車輪のタイヤフラット検出装置
DE3309908A1 (de) * 1982-04-22 1983-11-03 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Verfahren zur erkennung von flachstellen an schienenraedern
WO1986001167A1 (fr) * 1984-08-14 1986-02-27 Haollberg Karl Rune Soeren Procede et dispositif de detection de roues avec des bandes de roulement deformees dans des vehicules de chemin de fer
WO1993025872A1 (fr) * 1992-06-12 1993-12-23 Frontec Pajala Ab Dispositif de pesage pour vehicules montes sur rails
DE4432329A1 (de) * 1994-09-10 1996-03-14 Daimler Benz Ag Verfahren zur Zuglauf- und Fahrwegüberwachung
ZA962439B (en) * 1995-05-09 1996-10-01 Plasser Railway Machinery Sout Flat wheel detector

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DATABASE WPI Section EI Week 199710, Derwent World Patents Index; Class S02, AN 1997-109264, XP002140109 *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 278 (P - 242) 10 December 1983 (1983-12-10) *

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207091A1 (fr) * 2000-11-16 2002-05-22 Siemens Aktiengesellschaft Dispositif pour détecter des non-uniformités dans les roues de véhicules ferroviaires
WO2004071840A1 (fr) * 2003-02-13 2004-08-26 Schenck Process Gmbh Parcours de mesure permettant de determiner differentes grandeurs physiques de vehicules ferroviaires
FR2893900A1 (fr) * 2005-11-29 2007-06-01 Signal Dev Sarl Procede et dispositif de detection de defauts de circularite de roues de materiel ferroviaire et systeme comprenant un tel dispositif
WO2007063209A1 (fr) * 2005-11-29 2007-06-07 Signal Developpement Procede et dispositif de detection de defauts de circularite de roues de materiel ferroviaire et systeme comprenant un tel dispositif
EP1839990A3 (fr) * 2006-03-31 2008-11-05 Bernd Neuroth Dispositif pour la vérification des roues d'un véhicule ferroviaire
EP1839990A2 (fr) * 2006-03-31 2007-10-03 Bernd Neuroth Dispositif pour la vérification des roues d'un véhicule ferroviaire
WO2008021688A2 (fr) * 2006-08-15 2008-02-21 General Electric Company Système et procédé d'acquisition de position de matériel roulant
WO2008021688A3 (fr) * 2006-08-15 2008-05-15 Gen Electric Système et procédé d'acquisition de position de matériel roulant
WO2008094064A1 (fr) * 2007-01-31 2008-08-07 Plotnikov Sergei Vasil Evich Procédé de surveillance des paramètres d'une paire de roues et de sa position par rapport à des rails
EA012776B1 (ru) * 2007-01-31 2009-12-30 Закрытое Акционерное Общество "Транстех" Способ мониторинга параметров колесной пары и ее положения относительно рельсового пути
WO2009142532A1 (fr) * 2008-05-20 2009-11-26 Luchkin Viktor Alexeevich Semelle de rail
WO2009142531A1 (fr) * 2008-05-20 2009-11-26 Luchkin Viktor Alexeevich Procédé de mesure de poids et de diagnostic de transport ferroviaire sous le patin d’un rail utilisant la semelle de rails
WO2009142533A1 (fr) * 2008-05-20 2009-11-26 Luchkin Viktor Alexeevich Balance pour peser des objets ferroviaires mobiles statiques ou dynamiques utilisant une semelle de rail
KR101048804B1 (ko) 2009-04-30 2011-07-12 한국유지관리 주식회사 레일 누적 통과 톤수 실측 장치
GB2499602A (en) * 2012-02-21 2013-08-28 Abmech Design And Analysis Ltd Load measuring elastomeric rail pad
EP2647543A1 (fr) 2012-04-04 2013-10-09 SST Signal uns System Technik GmbH Système de détection de caractéristiques de véhicules ferroviaires passant
DE102012006844A1 (de) * 2012-04-04 2013-10-10 Sst Signal & System Technik Gmbh System zur Erfassung von Eigenschaften vorbeifahrender Schienenfahrzeuge
EP2647543B1 (fr) 2012-04-04 2017-03-01 voestalpine SIGNALING Siershahn GmbH Système de détection de caractéristiques de véhicules ferroviaires passant
US10728988B2 (en) 2015-01-19 2020-07-28 Tetra Tech, Inc. Light emission power control apparatus and method
US10616556B2 (en) 2015-02-20 2020-04-07 Tetra Tech, Inc. 3D track assessment method
US10616557B2 (en) 2015-02-20 2020-04-07 Tetra Tech, Inc. 3D track assessment method
US11259007B2 (en) 2015-02-20 2022-02-22 Tetra Tech, Inc. 3D track assessment method
US11399172B2 (en) 2015-02-20 2022-07-26 Tetra Tech, Inc. 3D track assessment apparatus and method
US11196981B2 (en) 2015-02-20 2021-12-07 Tetra Tech, Inc. 3D track assessment apparatus and method
US10582187B2 (en) 2015-02-20 2020-03-03 Tetra Tech, Inc. 3D track assessment method
US10616558B2 (en) 2015-02-20 2020-04-07 Tetra Tech, Inc. 3D track assessment method
CN106274982A (zh) * 2016-07-28 2017-01-04 宁波市江北九方和荣电气有限公司 车辆轮对在线动态检测系统电缆环形传感器驱动电路
CN106394606B (zh) * 2016-11-10 2018-08-24 北京康拓红外技术股份有限公司 一种铁路车辆车轮失圆检测方法及检测装置
CN106394606A (zh) * 2016-11-10 2017-02-15 北京康拓红外技术股份有限公司 一种铁路车辆车轮失圆检测方法及检测装置
US10435052B2 (en) 2017-02-22 2019-10-08 Tetra Tech, Inc. Broken wheel detection system
US10723373B2 (en) 2017-02-22 2020-07-28 Tetra Tech, Inc. Broken wheel detection system
US11142230B2 (en) 2017-02-22 2021-10-12 Tetra Tech, Inc. Broken wheel detection system
US11560165B2 (en) 2018-06-01 2023-01-24 Tetra Tech, Inc. Apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US10807623B2 (en) 2018-06-01 2020-10-20 Tetra Tech, Inc. Apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US10870441B2 (en) 2018-06-01 2020-12-22 Tetra Tech, Inc. Apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US11377130B2 (en) 2018-06-01 2022-07-05 Tetra Tech, Inc. Autonomous track assessment system
US11919551B2 (en) 2018-06-01 2024-03-05 Tetra Tech, Inc. Apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US10730538B2 (en) 2018-06-01 2020-08-04 Tetra Tech, Inc. Apparatus and method for calculating plate cut and rail seat abrasion based on measurements only of rail head elevation and crosstie surface elevation
US11305799B2 (en) 2018-06-01 2022-04-19 Tetra Tech, Inc. Debris deflection and removal method for an apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US10625760B2 (en) 2018-06-01 2020-04-21 Tetra Tech, Inc. Apparatus and method for calculating wooden crosstie plate cut measurements and rail seat abrasion measurements based on rail head height
RU2749559C1 (ru) * 2018-07-20 2021-06-15 Шенк Процесс Юроп Гмбх Способ и компоновочная схема идентификации колеса рельсового транспортного средства
WO2020015960A1 (fr) * 2018-07-20 2020-01-23 Schenck Process Europe Gmbh Procédé et système de reconnaissance d'une roue de véhicule ferroviaire
DE102018119247B4 (de) 2018-08-08 2022-02-03 Schenck Process Europe Gmbh Messsystem und Messsystemgruppe
DE102018119247A1 (de) * 2018-08-08 2020-02-13 Schenck Process Europe Gmbh Messsystem und Messsystemgruppe
CN113544040A (zh) * 2019-03-22 2021-10-22 盖茨纳工业原料控股有限责任公司 铁路车道
WO2020191418A1 (fr) * 2019-03-22 2020-10-01 Getzner Werkstoffe Holding Gmbh Voie ferrée
RU2778101C1 (ru) * 2019-03-22 2022-08-15 Гетцнер Веркштоффе Холдинг Гмбх Железнодорожный путь
CN113544040B (zh) * 2019-03-22 2024-03-05 盖茨纳工业原料控股有限责任公司 铁路车道
US11169269B2 (en) 2019-05-16 2021-11-09 Tetra Tech, Inc. System and method for generating and interpreting point clouds of a rail corridor along a survey path
US10908291B2 (en) 2019-05-16 2021-02-02 Tetra Tech, Inc. System and method for generating and interpreting point clouds of a rail corridor along a survey path
US11782160B2 (en) 2019-05-16 2023-10-10 Tetra Tech, Inc. System and method for generating and interpreting point clouds of a rail corridor along a survey path
DE102020127311A1 (de) 2020-10-16 2022-04-21 BEN-INNOVA Systemtechnik GmbH Vorrichtung zur Festbrems- und/oder Heißläuferortung bei Schienenfahrzeugen und System mit einer Vorrichtung zur Festbrems- und/oder Heißläuferortung und zumindest einer Schwelle zur Auflage von Schienen

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